Question

A does 20% less work then B. if A can finish a piece of work in 15/2 hours, then B can finish it in ______?

Answer 1

Answer is 6 hrs.ITS simple arithmetic knowledge.....

Answer 2

let work done by B be x
work done by A is x - 20% of x
time taken by A= 7.5 hrs
X - (20/100)x = 7.5 hrs
80/100x = 7.5 hrs
x =
$7.5 \times 100 \div 80$
9.375 hrs according to calculater